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EP0178451B1 - Annunciator identification arrangement in an alarm system - Google Patents

Annunciator identification arrangement in an alarm system Download PDF

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Publication number
EP0178451B1
EP0178451B1 EP85111385A EP85111385A EP0178451B1 EP 0178451 B1 EP0178451 B1 EP 0178451B1 EP 85111385 A EP85111385 A EP 85111385A EP 85111385 A EP85111385 A EP 85111385A EP 0178451 B1 EP0178451 B1 EP 0178451B1
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EP
European Patent Office
Prior art keywords
annunciator
current
line
alarm
signal line
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EP85111385A
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German (de)
French (fr)
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EP0178451A1 (en
Inventor
Peer Dr.-Ing. Thilo
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Siemens AG
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Siemens AG
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Priority to AT85111385T priority Critical patent/ATE42851T1/en
Publication of EP0178451A1 publication Critical patent/EP0178451A1/en
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/04—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/005—Alarm systems in which substations are interrogated in succession by a central station with substations connected in series, e.g. cascade

Definitions

  • the invention relates to a device for detector identification in a hazard alarm system, in particular a fire alarm system, according to the preamble of patent claim 1.
  • detector identification is readily possible.
  • alarm systems use special detectors and control panels, so that a complete retrofitting of existing systems would be required.
  • Hazard detection systems with detector identification are known per se. However, they usually require specially designed detectors, the addresses of which must be encoded in the individual detector for identification. Corresponding evaluation devices in the control center can then determine and display the address of the detector concerned from the code transmitted or queried by the detector.
  • Retrofitting an existing system requires not only the retrofitting in the control center, but also detectors equipped with a codable addressing device. These measures disadvantageously result in high costs and also an individual setting of the respective detector coding in the individual detectors.
  • the object of the invention is therefore to avoid the disadvantages described and to create additional circuit arrangements for the individual detectors and for the control center for a hazard detection system described at the outset, such as has been sold by the applicant for years, which permit simple and reliable detector identification, without the detector address having to be set individually in each detector.
  • the device according to the invention for detector identification in a hazard alarm system consists of simple additions and can advantageously also be retrofitted in existing systems without influencing the original functions. It is particularly advantageous that no individual address has to be set at the detector location, but that the detector address is determined by the sequence of the detectors on the detector line. This eliminates the facilities and work otherwise required for setting the address. In addition, the system is also more reliable, since incorrect multiple assignment of an address and other incorrect settings are avoided.
  • FIG. 2 shows a detector identification circuit arrangement for recognizing and displaying the detector address in the control center.
  • FIG. 1 A circuit arrangement according to the invention for a detector add-on for detector identification is shown in FIG. 1.
  • the detector additional circuit arrangement MZS1 is arranged in front of the actual detector M1 in the message line ML. It is connected to the control center Z via the terminals 1 and 4 and to the following detector additional circuit arrangement MZS2, which is followed by a detector M2, etc., via the terminals 1 'and 5.
  • the detector M1 itself is connected to terminals a and b. Terminals 1, 1 'and a are positive compared to terminals 4, b and 5.
  • the line voltage UL lies between terminals 1 and 4, which e.g. Can be 20 volts.
  • the line current IL is, for example, 5 mA in the idle state and consists of the monitoring current through a terminating resistor at the end of the signal line ML (not shown here) and the sum of the supply currents of all detector additional circuit arrangements MZS1, MZS2, etc. and detectors M1, M2 etc.
  • a flip-flop FF provided in the detector additional circuit arrangement MZS1 is supplied with the line voltage UL via the connections (+) and (-) and was set when the line voltage UL was switched on via a first differentiating element R1, C1 and the set input S so that the output Ci via the blocked Zener diode ZD and the resistor RT the transistor TR is turned on and thus the line voltage of 20 volts is also at the terminals 1 ', 5 and via the light emitting diode LED and the resistor RL at the terminals a and b.
  • the detector add-ons MZS1, MZS2, ... this state is repeated for all subsequent detector add-ons and detectors.
  • the voltage across the series connection of the resistor RL and the light-emitting diode LED and the detector M1 breaks down to 10 volts.
  • the central current Z limits the line current (IL) to a first current limit of 10 mA.
  • the control center Z detects this state and then increases its current output capability to a second current limit value of 100 mA (flashing cycle) in a predetermined clock ratio, for example in a second rhythm, and outputs these current pulses (IPZ) to the
  • This process is continued in chronological order with each further current pulse (IPZ).
  • a detector identification circuit arrangement is assigned to the evaluation device and inserted into the detection line.
  • This detector identification circuit arrangement monitors the entire line current of all connected signal lines and counts the current pulses in the event of an alarm.
  • the detector identification circuit arrangement recognizes the first current pulse with increased current flow (100 mA) and thus the number of the alarm triggering detector. This number is saved and displayed on an encoder, for example on a two-digit 7-segment display. Together with the display of the alarm line that triggers the alarm, the relevant detector is clearly identified.
  • a detector identification circuit device MIS according to the invention is shown in FIG. 2.
  • the common supply voltage UV of e.g. 24 volts connected.
  • All of the evaluation circuits AWE of the individual signal lines ML which are not shown here and are common in the known systems, are fed from the terminals 7 'and 9, in which the specific voltage and current values described above are generated.
  • the common line current IL flows through a measuring resistor RM arranged in the wire 8-9 of the signal line ML and is in this embodiment as a voltage drop across the operational amplifier OV, the gain of which is set with the resistors R3 and R4, the input E of the analog-digital AD converter supplied.
  • the analog-to-digital converter AD is initiated by microcomputer MR, which is acted upon at its input B by the central-side current pulses IPZ (flashing clock) for the correct determination of the pulse current size.
  • the analog-to-digital converter AD supplies the digitized current quantity to the microcomputer MR at its multipole output QW.
  • the address of the alarm-triggering detector is determined, processed in an appropriately prepared form via the multi-pin output QR of the two-digit digital display ANZ and displayed there.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire Alarms (AREA)
  • Alarm Systems (AREA)

Abstract

1. Annunciator identification arrangement in an alarm system, in particular fire alarm system, having a plurality of closed-circuit protected, two-wire signal lines (ML) connected to a central unit (Z) with an evaluation device (AWE), to which signal lines in each case a plurality of annunciators (M1, M2, ...) are connected, an alarm-triggering annunciator causing a voltage dip in the corresponding line voltage (UL) as a result of a central limitation of the line current (IL) to a first current limit value, and an alarm signal of the corresponding signal line (ML) being derived therefrom in the central unit (Z), and the central unit (Z) outputting current pulses (IPZ) with a second, increased current limit value to the corresponding signal line (ML) characterized in that there is connected upstream of each annunciator (M1, M2, ...) an annunciator attachment circuit arrangement (MZS1, MZS2, ...) which has a bistable multivibrator (FF) having a setting input S which can be acted upon by a first differentiating element (R1, C1) connected to the signal line (ML) and having a reset input (R) which can be acted upon by a second differentiating element (R2, C2) connected to the signal line (ML) and having arranged in a wire (4, 5) of the signal line (ML) a switching element (TR) which can be controlled via a voltage limiter circuit (ZD) by the output (Q) of the bistable multivibrator (FF),the annunciator (M1, M2, ...) being connected to the signal line (ML) via light-emitting diode (LED), in that in the central unit (Z) there is assigned to the evaluation device (AWE) an annunciator identification circuit arrangement (MIS) which has a current measuring device (SME) for monitoring the line current (IL), an analog-digital converter (AD), the first input (E) of which is acted upon by the measured line current, and a microprocessor (MR) with a display device (ANZ) for the annunciator address connected downstream of the analog-digital converter (AD), the output (QW) of the analog-digital converter (AD) supplying the digitized current values to the microprocessor (MR), which controls a further input (F) of the analog-digital converter (AD) and which is acted upon by the central current pulses (IPZ) of the increased line current (flashing pulse), and in that, with each central current pulse (IPZ), in chronological order a limited (ZD) voltage is switched to the annunciator (M1, M2, ...) connected downstream of the respective annunciator attachment circuit arrangement (MZS1, MZS2, ...), the alarm-triggering annunciator causing an increased current flow, on the basis of which the annunciator identification circuit arrangement (MIS) determines and displays (ANZ) the address of the annunciator triggering the alarm.

Description

Die Erfindung bezieht sich auf eine Einrichtung zur Melderidentifizierung in einer Gefahrenmeldeanlage, insbesondere Brandmeldeanlage, gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for detector identification in a hazard alarm system, in particular a fire alarm system, according to the preamble of patent claim 1.

Bei bekannten Gefahrenmeldeanlagen können bis zu 30 Melder an einer Zweidraht-Meldeleitung angeschlossen sein. Löst ein Melder Alarm aus, so wird in der Zentrale die betreffende Meldeleitung angezeigt. In zunehmenden Maße besteht jedoch der Wunsch, auftretende Alarme oder sonstige Ereignisse, wie z.B. Störung durch Leitungsbruch oder Kurzschluß, genauer lokalisieren zu können. Daher wurden Gefahrenmeldeanlagen geschaffen, die eine Einzelidentifizierung der Melder ermöglichen.In known danger detection systems, up to 30 detectors can be connected to a two-wire detection line. If a detector triggers an alarm, the relevant signaling line is displayed in the control center. However, there is an increasing desire for alarms or other events, such as Malfunction due to line break or short circuit to be able to localize more precisely. For this reason, hazard alarm systems were created that enable the detectors to be identified individually.

In modernen Gefahrenmeldeanlagen, wie sie beispielsweise aus der Pulsmeldetechnik (DE-PS 2 533 382) bekannt sind, ist die Melderidentifizierung ohne weiteres möglich. Derartige Meldeanlagen verwenden jedoch spezielle Melder und Zentralen, so daß eine völlige Umrüstung bestehender Anlagen erforderlich wäre. Vielfach besteht jedoch der Wunsch, bestehende Anlagen zumindest teilweise so zu ergänzen, daß einzelne Melder identifiziert werden können.In modern hazard detection systems, such as are known, for example, from pulse detection technology (DE-PS 2 533 382), detector identification is readily possible. However, such alarm systems use special detectors and control panels, so that a complete retrofitting of existing systems would be required. However, there is often a desire to at least partially supplement existing systems so that individual detectors can be identified.

Gefahrenmeldeanlagen mit Melderidentifizierung sind an sich bekannt. Sie erfordern jedoch meistens besonders ausgestaltete Melder, deren Adresse zur Identifizierung jeweils im einzelnen Melder codiert werden muß. Entsprechende Auswerteeinrichtungen in der Zentrale können dann bei Alarmgabe aus dem vom Melder übertragenen oder abgefragten Code die Adresse des betreffenden Melders ermitteln und anzeigen.Hazard detection systems with detector identification are known per se. However, they usually require specially designed detectors, the addresses of which must be encoded in the individual detector for identification. Corresponding evaluation devices in the control center can then determine and display the address of the detector concerned from the code transmitted or queried by the detector.

Eine Umrüstung einer bestehenden Anlage erfordert neben der Umrüstung in der Zentrale eigene Melder, die mit einer codierbaren Adressiereinrichtung ausgerüstet sind. Diese Maßnahmen verursachen in nachteiliger Weise einen hohen Kostenaufwand und auch noch ein individuelles Einstellen der jeweiligen Meldercodierung in den einzelnen Meldern. Aufgabe der Erfindung ist es daher, die geschilderten Nachteile zu vermeiden und für eine eingangs geschilderte Gefahrenmeldeanlage, wie sie beispielsweise seit Jahren vom Anmelder vertrieben wird, zusätzliche Schaltungsanordnungen für die einzelnen Melder und für die Zentrale zu schaffen, die eine einfache und zuverlässige Melderidentifizierung gestatten, ohne daß dabei in jedem Melder die Melderadresse individuell eingestellt werden muß.Retrofitting an existing system requires not only the retrofitting in the control center, but also detectors equipped with a codable addressing device. These measures disadvantageously result in high costs and also an individual setting of the respective detector coding in the individual detectors. The object of the invention is therefore to avoid the disadvantages described and to create additional circuit arrangements for the individual detectors and for the control center for a hazard detection system described at the outset, such as has been sold by the applicant for years, which permit simple and reliable detector identification, without the detector address having to be set individually in each detector.

Diese Aufgabe wird erfindungsgemäß bei einer oben geschilderten Gefahrenmeldeanlage mit einer Einrichtung gelöst, die durch die Merkmale des Anspruchs 1 gekennzeichnet ist.This object is achieved according to the invention in a hazard alarm system described above with a device which is characterized by the features of claim 1.

Die erfindungsgemäße Einrichtung zur Melderidentifizierung in einer Gefahrenmeldeanlage besteht aus einfachen Zusätzen und läßt sich in vorteilhafter Weise auch in bestehenden Anlagen nachrüsten, ohne die ursprünglichen Funktionen zu beeinflussen. Besonders vorteilhaft ist dabei, daß am Melderort keine individuelle Adresse eingestellt werden muß, sondern daß die Melderadresse durch die Reihenfolge der Melder auf der Meldeleitung bestimmt wird. Dadurch entfallen die sonst zur Adresseneinstellung notwendigen Einrichtungen und Arbeiten. Darüber hinaus wird die Anlage auch zuverlässiger, da fälschliche Mehrfachvergabe einer Adresse und sonstige Fehleinstellungen vermieden werden.The device according to the invention for detector identification in a hazard alarm system consists of simple additions and can advantageously also be retrofitted in existing systems without influencing the original functions. It is particularly advantageous that no individual address has to be set at the detector location, but that the detector address is determined by the sequence of the detectors on the detector line. This eliminates the facilities and work otherwise required for setting the address. In addition, the system is also more reliable, since incorrect multiple assignment of an address and other incorrect settings are avoided.

Zweckmäßige Ausgestaltungen der Erfindung sind in den Unteransprüchen angeführt. Der Aufbau und die Wirkungsweise der erfindungsgemäßen Einrichtung zur Melderidentifizierung wird an einem Ausführungsbeispiel anhand der Zeichnung erläutert.Appropriate embodiments of the invention are set out in the subclaims. The structure and the mode of operation of the device for detector identification according to the invention is explained using an exemplary embodiment with reference to the drawing.

Die Fig. 1 zeigt eine Melderzusatz-Schaltungsanordnung zur Melderidentifizierung und1 shows an additional detector circuit arrangement for detector identification and

Fig. 2 zeigt eine Melderidentifizierungs-Schaltungsanordnung zur Erkennung und Anzeige der Melderadresse in der Zentrale.2 shows a detector identification circuit arrangement for recognizing and displaying the detector address in the control center.

Eine erfindungsgemäße Schaltungsanordnung für einen Melderzusatz zur Melderidentifizierung ist in Fig. 1 dargestellt. Die Melderzusatz-Schaltungsanordnung MZS1 ist jeweils vor dem eigentlichen Melder M1 in der Meldeleitung ML angeordnet. Über die Klemmen 1 und 4 ist sie mit der Zentrale Z und über die Klemmen 1' und 5 mit der folgenden Melderzusatz-Schaltungsanordnung MZS2, der ein Melder M2 nachgeschaltet ist, usw., verbunden. Der Melder M1 selbst ist an den Klemmen a und b angeschlossen. Dabei sind die Klemmen 1, 1' und a positiv gegenüber den Klemmen 4, b und 5.A circuit arrangement according to the invention for a detector add-on for detector identification is shown in FIG. 1. The detector additional circuit arrangement MZS1 is arranged in front of the actual detector M1 in the message line ML. It is connected to the control center Z via the terminals 1 and 4 and to the following detector additional circuit arrangement MZS2, which is followed by a detector M2, etc., via the terminals 1 'and 5. The detector M1 itself is connected to terminals a and b. Terminals 1, 1 'and a are positive compared to terminals 4, b and 5.

Im Ruhezsutand liegt zwischen den Klemmen 1 und 4 die Linienspannung UL, die z.B. 20 Volt betragen kann. Der Linienstrom IL beträgt im Ruhezustand beispielsweise 5 mA und besteht aus dem Überwachungsstrom durch einen Abschlußwiderstand am Ende der Meldeleitung ML (hier nicht dargestellt) sowie aus der Summe der Versorgungsströme aller Melderzusatz-Schaltungsanordnungen MZS1, MZS2, usw. und Melder M1, M2 usw. Eine in der Melderzusatz-Schaltungsanordnung MZS1 vorgesehene Kippstufe FF wird über die Anschlüsse (+) und (-) mit der Linienspannung UL versorgt und wurde beim Einschalten der Linienspannung UL über ein erstes Differenzierglied R1, C1 und den Setzeingang S so gesetzt, daß am Ausgang Ci über die gesperrte Zenerdiode ZD und den Widerstand RT der Transistor TR leitend geschaltet ist und somit die Linienspannung von 20 Volt ebenfalls an den Klemmen 1', 5 und über die Leuchtdiode LED sowie den Widerstand RL an den Klemmen a und b liegt. Bei identischen Schaltungsanordnungen der Melderzusätze MZS1, MZS2, ... wiederholt sich dieser Zustand bei allen folgenden Melderzusätzen und Meidern.At rest, the line voltage UL lies between terminals 1 and 4, which e.g. Can be 20 volts. The line current IL is, for example, 5 mA in the idle state and consists of the monitoring current through a terminating resistor at the end of the signal line ML (not shown here) and the sum of the supply currents of all detector additional circuit arrangements MZS1, MZS2, etc. and detectors M1, M2 etc. A flip-flop FF provided in the detector additional circuit arrangement MZS1 is supplied with the line voltage UL via the connections (+) and (-) and was set when the line voltage UL was switched on via a first differentiating element R1, C1 and the set input S so that the output Ci via the blocked Zener diode ZD and the resistor RT the transistor TR is turned on and thus the line voltage of 20 volts is also at the terminals 1 ', 5 and via the light emitting diode LED and the resistor RL at the terminals a and b. With identical circuit arrangements of the detector add-ons MZS1, MZS2, ... this state is repeated for all subsequent detector add-ons and detectors.

Im Falle eines Alarms bricht die Spannung an der Reihenschaltung von dem Widerstand RL und der Leuchtdiode LED und dem Melder M1 auf 10 Volt zusammen. Dies ist dadurch möglich, weil in der Zentrale Z der Linienstrom (IL) auf einen ersten Stromgrenzwert von 10 mA begrenzt wird. Die Zentrale Z erkennt diesen Zustand und erhöht daraufhin in einem vorgegebenen Taktverhältnis, beispielsweise im Sekundenrhythmus, ihre Stromabgabefähigkeit auf einen zweiten Stromgrenzwert von 100 mA (Blinktakt) und gibt diese Stromimpulse (IPZ) auf dieIn the event of an alarm, the voltage across the series connection of the resistor RL and the light-emitting diode LED and the detector M1 breaks down to 10 volts. This is possible because the central current Z limits the line current (IL) to a first current limit of 10 mA. The control center Z detects this state and then increases its current output capability to a second current limit value of 100 mA (flashing cycle) in a predetermined clock ratio, for example in a second rhythm, and outputs these current pulses (IPZ) to the

betreffende Meldeleitung ML. Mit diesen erhöhten Stromimpulsen (IPZ) blinkt die Leuchtdiode LED des alarmauslösenden Melders, bis die Meldeleitung ML durch kurzzeitiges Abschalten der Versorgungsspannung (UV) zurückgestellt wird. Diese Maßnahmen werden in bekannten und vom Anmelder vertriebenen Gefahrenmeldeanlagen getroffen.relevant reporting line ML. With these increased current pulses (IPZ), the LED of the alarm-triggering detector flashes until the signal line ML is reset by briefly switching off the supply voltage (UV). These measures are taken in known hazard alarm systems distributed by the applicant.

Mit der erfindungsgemäßen Einrichtung werden nun beim Zusammenbrechen der Linienspannung UL unmittelbar nach dem Ansprechen des alarmauslösenden Melders alle Kippstufen FF der Melderzusatz-Schaltungsanordnungen MZS1, MZS2, usw. über das zweite Differenzierglied R2, C2 und den Rücksetzeingang R zurück gesetzt. Damit wird über die entsprechend ausgewählte Zenerdiode ZD, den Widerstand RT und den Transistor TR die begrenzte Ausgangsspannung von 10 Volt an die Klemmen 1', 5 gegeben. Der bei den ersten Stromimpuls (IPZ) mit dem erhöhten Stromangebot (zweiter Stromgrenzwert = 100 mA) der Zentrale Z verbundene Spannungsanstieg kann also nur die erste Melderzusatz-Schaltungsanordnung MZS1 und den ersten Melder M1 erreichen und setzt dort über das erste Differenzierglied R1, C1 und den Setzeingang S die Kippstufe FF derart, daß der Transistor TR voll leitend wird und damit der nachfolgende, zweite Stromimpuls (IPZ) bei der zweiten Melderzusatz-Schaltungsanordnung MZS2 und beim zweiten Melder M2 wirksam wird. Dieser Vorgang wird mit jedem weiteren Stromimpuls (IPZ) in zeitlicher Reihenfolge fortgesetzt. Dabei bleibt der Linienstrom IL annähernd gleich, da der angesprochene d.h. der alarmauslösende Melder immer die durch die vorherigen Melderzusatz-Schaltungsanordnungen MZS1, MZS2, ... bestimmte konstante Linienspannung von UL = 10 Volt erhält. Erst wenn nach entsprechend vielen Stromimpulsen (IPZ) die Melderzusatz-Schaltungsanordnung des alarmauslösenden Melders voll durchschaltet, kann eine erhöhte Spannung am alarmauslösenden Melder wirksam werden und damit ein erhöhter Linienstrom IL mit dem zweiten Grenzwert von 100 mA fließen.With the device according to the invention, when the line voltage UL collapses, all flip-flops FF of the additional detector circuit arrangements MZS1, MZS2, etc. are reset via the second differentiator R2, C2 and the reset input R immediately after the alarm-triggering detector has responded. The limited output voltage of 10 volts is thus given to the terminals 1 ', 5 via the correspondingly selected Zener diode ZD, the resistor RT and the transistor TR. The voltage rise associated with the increased current supply (second current limit value = 100 mA) of the central station Z in the first current pulse (IPZ) can therefore only reach the first detector additional circuit arrangement MZS1 and the first detector M1 and sets there via the first differentiating element R1, C1 and the set input S the flip-flop FF in such a way that the transistor TR becomes fully conductive and the subsequent second current pulse (IPZ) becomes effective in the second detector additional circuit arrangement MZS2 and in the second detector M2. This process is continued in chronological order with each further current pulse (IPZ). The line current IL remains approximately the same, since the addressed the alarm triggering detector always receives the constant line voltage of UL = 10 volts determined by the previous detector additional circuit arrangements MZS1, MZS2, ... Only after the corresponding number of current pulses (IPZ) has the detector additional circuit arrangement of the alarm-triggering detector fully switched on, can an increased voltage at the alarm-triggering detector become effective and thus an increased line current IL with the second limit value of 100 mA flow.

In der Zentrale Z wird erfindungsgemäß eine Melderidentifizierungs-Schaltungsanordnung der Auswerteeinrichtung zugeordnet und in die Meldelinie eingefügt. Diese Melderidentifizierungs-Schaltungsanordnung überwacht den gesamten Linienstrom aller angeschlossenen Meldeleitungen und zählt im Alarmfall die Stromimpulse mit. Dabei erkennt die Melderidentifizierungs-Schaltungsanordnung den ersten Stromimpuls mit erhöhtem Stromfluß (100 mA) und damit die Nummer des alarmauslösenden Melders. Diese Nummer wird gespeichert und über einen Codierer beispielsweise auf einer zweistelligen 7-Segment-Anzeige angzeigt. Zusammen mit der ohnehin vorhandenen Anzeige der alarmauslösenden Meldeleitung ist damit der betreffende Melder eindeutig identifiziert.In control center Z, a detector identification circuit arrangement is assigned to the evaluation device and inserted into the detection line. This detector identification circuit arrangement monitors the entire line current of all connected signal lines and counts the current pulses in the event of an alarm. The detector identification circuit arrangement recognizes the first current pulse with increased current flow (100 mA) and thus the number of the alarm triggering detector. This number is saved and displayed on an encoder, for example on a two-digit 7-segment display. Together with the display of the alarm line that triggers the alarm, the relevant detector is clearly identified.

Eine erfindungsgemäße Melderidentifizierungs-Schaltungseinrichtung MIS ist in Fig. 2 dargestellt. An den Klemmen 7 und 8 wird die gemeinsame Versorgungsspannung UV von z.B. 24 Volt angeschlossen. Von den Klemmen 7' und 9 werden im Vielfach alle hier nicht dargestellten, in den bekannten Anlagen gebräuchlichen Auswerteschaltungen AWE der einzelnen Meldeleitungen ML gespeist, in denen die oben geschilderten spezifischen Spannungs- und Stromwerte erzeugt werden. Der gemeinsame Linienstrom IL fließt über einen in der Ader 8-9 der Meldeleitung ML angeordneten Meßwiderstand RM und wird bei diesem Ausführungsbeispiel als Spannungsabfall über den Operationsverstärker OV, dessen Verstärkung mit den Widerständen R3 und R4 eingestellt wird, dem Eingang E des Analog-Digital-Wandlers AD zugeführt. Über den Eingang F wird der Analog-Digital-Wandler AD von Mikrorechner MR, der an seinem Eingang B von den zentralseitigen Stromimpulsen IPZ (Blinktakt) beaufschlagt wird, zur zeitrichtigen Bestimmung der Impulsstromgröße veranlaßt. Der Analog-Digital-Wandler AD liefert an seinem mehrpoligen Ausgang QW die digitalisierte Stromgröße an den Mikrorechner MR. Dort wird die Adresse des alarmauslösenden Melder ermittelt, in entsprechend aufbereiteter Form über den mehrpoligen Ausgang QR der zweistelligen Digitalanzeige ANZ angeboten und dort angezeigt.A detector identification circuit device MIS according to the invention is shown in FIG. 2. The common supply voltage UV of e.g. 24 volts connected. All of the evaluation circuits AWE of the individual signal lines ML, which are not shown here and are common in the known systems, are fed from the terminals 7 'and 9, in which the specific voltage and current values described above are generated. The common line current IL flows through a measuring resistor RM arranged in the wire 8-9 of the signal line ML and is in this embodiment as a voltage drop across the operational amplifier OV, the gain of which is set with the resistors R3 and R4, the input E of the analog-digital AD converter supplied. Via input F, the analog-to-digital converter AD is initiated by microcomputer MR, which is acted upon at its input B by the central-side current pulses IPZ (flashing clock) for the correct determination of the pulse current size. The analog-to-digital converter AD supplies the digitized current quantity to the microcomputer MR at its multipole output QW. There, the address of the alarm-triggering detector is determined, processed in an appropriately prepared form via the multi-pin output QR of the two-digit digital display ANZ and displayed there.

Bezuaszeichenliste

  • AD Analog-Digital-Wandler
  • ANZ Anzeigeeinrichtung
  • AWE Auswerteeinrichtung
  • FF Flip-Flop (Kippstufe)
  • IL Linienstrom
  • IPZ Stromimpulse bei Alarm mit zweiten Stromgrenzwert v. z.B. 100 mA, sog. "Blinktakt", von der Zentrale aus.
  • MIS Melderidentifizierungs-Schaltungsanordnung
  • ML Meldeleitung
  • MR Mikrorechner
  • MZS Melderzusatz-Schaltungsanordnung
  • OV Operationsverstärker
  • R1, C1 Differenzierglied 1
  • R2, C2 Differenzierglied 2
  • R3, R4 Spannungsteiler
  • RM Meßwiderstand
  • SME Strommeßeinrichtung
  • TR steuerbares Schaltelement (z.B. Transistor)
  • UL Linienspannung
  • UV Versorgungsspannung
  • Z Zentrale
  • ZD Spannungsbegrenzerschaltung (z.B. Zenerdiode)
Reference list
  • AD analog-digital converter
  • ANZ display device
  • AWE evaluation device
  • FF flip-flop (flip-flop)
  • IL line current
  • IPZ current pulses in the event of an alarm with a second current limit of 100 mA, so-called "flashing clock", from the control center.
  • MIS detector identification circuitry
  • ML reporting line
  • MR microcomputer
  • MZS detector additional circuit arrangement
  • OV operational amplifier
  • R1, C1 differentiator 1
  • R2, C2 differentiator 2
  • R3, R4 voltage divider
  • RM measuring resistor
  • SME current measuring device
  • TR controllable switching element (e.g. transistor)
  • UL line voltage
  • UV supply voltage
  • Z headquarters
  • ZD voltage limiter circuit (e.g. Zener diode)

Claims (10)

1. Annunciator identification arrangement in an alarm system, in particular fire alarm system, having a plurality of closed-circuit protected, two-wire signal lines (ML) connected to a central unit (Z) with an evaluation device (AWE), to which signal lines in each case a plurality of annunciators (M1, M2, ...) are connected, an alarm-triggering annunciator causing a voltage dip in the corresponding line voltage (UL) as a result of a central limitation of the line current (IL) to a first current limit value, and an alarm signal of the corresponding signal line (ML) being derived therefrom in the central unit (Z), and the central unit (Z) outputting current pulses (IPZ) with a second, increased current limit value to the corresponding signal line (ML) characterized in that there is connected upstream of each annunciator (M1, M2, ...) an annunciator attachment circuit arrangement (MZS1, MZS2, ...) which has a bistable multivibrator (FF) having a setting input S which can be acted upon by a first differentiating element (R1, C1) connected to the signal line (ML) and having a reset input (R) which can be acted upon by a second differentiating element (R2, C2) connected to the signal line (ML) and having arranged in a wire (4, 5) of the signal line (ML) a switching element (TR) which can be controlled via a voltage limiter circuit (ZD) by the output (Q) of the bisable multivibrator (FF), the annunciator (M1, M2, ...) being connected to the signal line (ML) via a light-emitting diode (LED), in that in the central unit (Z) there is assigned to the evaluation device (AWE) an annunciator identification circuit arrangement (MIS) which has a current measuring device (SME) for monitoring the line current (IL), an analog-digital converter (AD), the first input (E) of which is acted upon by the measured line current, and a microprocessor (MR) with a display device (ANZ) for the annunciator address connected downstream of the analog-digital converter (AD), the output (QW) of the analog-digital converter (AD) supplying the digitized current values to the microprocessor (MR), which controls a further input (F) of the analog-digital converter (AD) and which is acted upon by the central current pulses (IPZ) of the increased line current (flashing pulse), and in that, with each central current pulse (IPZ), in chronological order a limited (ZD) voltage is switched to the annunciator (M1, M2, ...) connected downstream of the respective annunciator attachment circuit arrangement (MZS1, MZS2, ...), the alarm-triggering annunciator causing an increased current flow, on the basis of which the annunciator identification circuit arrangement (MIS) determines and displays (ANZ) the address of the annunciator triggering the alarm.
2. Arrangement according to Claim 1, characterized in that the differentiating elements (R1, C1 or R2, C2) are formed by RC elements.
3. Arrangement according to Claim 1, characterized in that the voltage limiter circuit (ZD) is formed by a Zener diode.
4. Arrangement according to Claim 1, characterized in that the controllable switching element (TR) is formed by a junction field-effect transistor or by an MOS transistor.
5. Arrangement according to Claim 1, characterized in that the current measuring device (SME) is formed by a measuring resistor (RM) arranged in one of the wires (9, 8) of the signal line (ML) and by an operational amplifier (OV) which can be set with a voltage divider (R3, R4) and which supplies the voltage proportional to the line current (IL) to the analog-digital converter (AD).
6. Arrangement according to Claim 1, characterized in that the display device (ANZ) is formed by a multiposition 7-segment display which is connected downstream of the microprocessor (MR).
7. Arrangement according to Claim 1, characterized in that the annunciator attachment circuit arrangement (MZS) is arranged in the socket of the annunciator.
8. Arrangement according to Claim 1, characterized in that the bistable multivibrator (FF) is designed so that it switches through the switching element (TR) in the pulse pauses of the current pulses (IPZ) output from the central unit (Z).
9. Arrangement according to Claim 1, characterized in that a plurality of annunciator identification circuit arrangements (MIS) are arranged in the central unit (Z) and are assigned to the respective evaluation devices (AWE) of the respective signal line (ML).
10. Arrangement according to Claim 1, characterized in that the current pulses (IPZ) generated in the event of an alarm in the central unit (Z) are changed in their frequency and/or in their pulse duty factor with respect to the normal pulse, that is to say without annunciator identification, for identifying the annunciator.
EP85111385A 1984-09-12 1985-09-09 Annunciator identification arrangement in an alarm system Expired EP0178451B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85111385T ATE42851T1 (en) 1984-09-12 1985-09-09 DEVICE FOR DETECTOR IDENTIFICATION IN AN ALERT SYSTEM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3433479 1984-09-12
DE3433479 1984-09-12

Publications (2)

Publication Number Publication Date
EP0178451A1 EP0178451A1 (en) 1986-04-23
EP0178451B1 true EP0178451B1 (en) 1989-05-03

Family

ID=6245221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85111385A Expired EP0178451B1 (en) 1984-09-12 1985-09-09 Annunciator identification arrangement in an alarm system

Country Status (3)

Country Link
EP (1) EP0178451B1 (en)
AT (1) ATE42851T1 (en)
DE (1) DE3569997D1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297008B (en) * 1967-01-11 1969-06-04 Siemens Ag Signaling system with detectors connected in parallel in a two-wire loop
DE2230934B1 (en) * 1972-06-23 1973-02-15 Preussag Ag, Feuerschutz, 2060 Bad Oldesloe Alarm device, preferably for fire alarms
DE2245928A1 (en) * 1972-09-19 1974-04-04 Preussag Ag Feuerschutz PROCEDURE AND EQUIPMENT FOR CENTRALIZED DETECTION OF TRIPPED DETECTORS
DE2533330C3 (en) * 1975-07-25 1981-08-13 Siemens AG, 1000 Berlin und 8000 München Method and device for the transmission of measured values in a fire alarm system
DE2533354C3 (en) * 1975-07-25 1979-08-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Device for transmitting control commands in a fire protection system
DE2533382C2 (en) * 1975-07-25 1980-07-03 Siemens Ag, 1000 Berlin Und 8000 Muenchen Method and device for the transmission of measured values in a fire alarm system
DE2935335C2 (en) * 1979-08-31 1985-08-08 Siemens AG, 1000 Berlin und 8000 München DC alarm system
DE3225081A1 (en) * 1982-07-05 1984-01-12 Siemens AG, 1000 Berlin und 8000 München METHOD AND DEVICE FOR AUTOMATICALLY INQUIRING THE DETECTOR MEASUREMENT VALUE AND DETECTOR DETECTION IN A DANGER DETECTING SYSTEM

Also Published As

Publication number Publication date
ATE42851T1 (en) 1989-05-15
DE3569997D1 (en) 1989-06-08
EP0178451A1 (en) 1986-04-23

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